Air vent



FIG. 1 is an illustration of a perspective view of an air vent on a closet;

FIG. 2 is an illustration of a perspective view of the air vent;

FIG. 3 is an illustration of a top view of the air vent;

FIG. 4 is an illustration of a side view of the air vent;

FIG. 5 is an illustration of a front view of the air vent;

FIG. 6 is an illustration of a rear view of the air vent;

FIG. 7 is an illustration of a bottom view of the air vent; and,

FIG. 8 is an illustration of a partial sectional perspective view of three air vents on a closet.

The features shown in broken lines in the drawings depict environmental subject matter only and form no part of the claimed design. 

The ornamental design for an air vent, as shown and described. 